CHUCK

摘要

A chuck in which there is a plurality of base jaws radially adjustably connected to the chuck body; the latter has detachably arranged therein a plurality of auxiliary jaws mounted on the base jaws; hook-shaped holding means are respectively connected to the base jaws and the respectively pertaining auxiliary jaws. In the operative position of the chuck, the holding means of each base jaw are in hooked engagement with the holding means for the pertaining auxiliary jaws to thereby prevent the respective auxiliary jaws from radially moving outwardly relative to the pertaining base jaws, clamping spring means operatively connected to the base jaws and respectively associated with the auxiliary jaws being provided for preventing the pertaining auxiliary jaws from accidentally axially moving relative to the pertaining base jaws.